[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20210815001352.81927-13-gshan@redhat.com>
Date: Sun, 15 Aug 2021 08:13:43 +0800
From: Gavin Shan <gshan@...hat.com>
To: kvmarm@...ts.cs.columbia.edu
Cc: linux-kernel@...r.kernel.org, james.morse@....com,
mark.rutland@....com, Jonathan.Cameron@...wei.com, will@...nel.org,
maz@...nel.org, pbonzini@...hat.com
Subject: [PATCH v4 12/21] KVM: arm64: Support SDEI_{PRIVATE, SHARED}_RESET hypercall
This supports SDEI_{PRIVATE, SHARED}_RESET. They are used by the
guest to purge the private or shared SDEI events, which are registered
previously.
Signed-off-by: Gavin Shan <gshan@...hat.com>
---
arch/arm64/kvm/sdei.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/arch/arm64/kvm/sdei.c b/arch/arm64/kvm/sdei.c
index 3fb33258b494..62efee2b67b8 100644
--- a/arch/arm64/kvm/sdei.c
+++ b/arch/arm64/kvm/sdei.c
@@ -582,6 +582,29 @@ static unsigned long kvm_sdei_hypercall_mask(struct kvm_vcpu *vcpu,
return ret;
}
+static unsigned long kvm_sdei_hypercall_reset(struct kvm_vcpu *vcpu,
+ bool private)
+{
+ struct kvm *kvm = vcpu->kvm;
+ struct kvm_sdei_kvm *ksdei = kvm->arch.sdei;
+ struct kvm_sdei_vcpu *vsdei = vcpu->arch.sdei;
+ unsigned int mask = private ? (1 << SDEI_EVENT_TYPE_PRIVATE) :
+ (1 << SDEI_EVENT_TYPE_SHARED);
+ unsigned long ret = SDEI_SUCCESS;
+
+ /* Sanity check */
+ if (!(ksdei && vsdei)) {
+ ret = SDEI_NOT_SUPPORTED;
+ goto out;
+ }
+
+ spin_lock(&ksdei->lock);
+ kvm_sdei_remove_kvm_events(kvm, mask, false);
+ spin_unlock(&ksdei->lock);
+out:
+ return ret;
+}
+
int kvm_sdei_hypercall(struct kvm_vcpu *vcpu)
{
u32 func = smccc_get_function(vcpu);
@@ -626,8 +649,14 @@ int kvm_sdei_hypercall(struct kvm_vcpu *vcpu)
break;
case SDEI_1_0_FN_SDEI_INTERRUPT_BIND:
case SDEI_1_0_FN_SDEI_INTERRUPT_RELEASE:
+ ret = SDEI_NOT_SUPPORTED;
+ break;
case SDEI_1_0_FN_SDEI_PRIVATE_RESET:
+ ret = kvm_sdei_hypercall_reset(vcpu, true);
+ break;
case SDEI_1_0_FN_SDEI_SHARED_RESET:
+ ret = kvm_sdei_hypercall_reset(vcpu, false);
+ break;
default:
ret = SDEI_NOT_SUPPORTED;
}
--
2.23.0
Powered by blists - more mailing lists